The Toxic and Chemical Substances Bureau said it had enacted controls on lead (II, IV) oxide, also known as red lead, after it was determined that a Chinese medicine clinic in Taichung had used it in ...

The use of this lead oxide powder to thicken and dry the Mona Lisa’s base layer was likely a fresh approach to painting in the early 1500s, but one that became common practice.

Leonardo da Vinci is renowned to this day for innovations in fields across the arts and sciences. Now, new analyses published in the Journal of the American Chemical Society show that his taste for ...

For example, compounds like red brick, red lead salt, lead oxide and lead chromate, which mirror cinnamon’s red color, have been added to increase the value of the spice, research shows. FDA officials ...